Switchboard safety device



' A. J. RYNO V SWITCHBOARD SAFETY DEVI CE 'Filed April 7, 1926 PatentedJuly 20, 1926.

UNITED STATES PATENT OFFICE.

ALLEN J. RYNO, or SALEM, MASSACHUSETTS.

SWITGHBOARD SAFETY IDEVIGE Application filed April 7, 1926. Serial No.100,441.

My invention relates to safety devices for use on switch boards atcentral power stations and other electrical control places wheresafety-first precautions are paramount.

It has for its purpose to minimize switch control errors; to provide asafety device of such simplicity and easy use as to render its continueduse attractive to operators; to provi'de a convenient and fool proofmeans for sight transmission of a give situation 011 designatedcircuits, as for instance when workmen are employed thereon, or otherhazard exists requiring the elimination of current; to insure anuninterrupted flow of current over a given circuit; to provide animproved construction for a signaling de vice, insuring positive resultsand obviating the accidental operation of or damaging results to switchboard equipment when placing for use or removing the same; and toprovide the various other advantages and results apparent from thefollowing specification.

I accomplish the objectsof my invention. as shown in the accompanyingdrawings, which form a part of this specification and, in which Figure 1shows a view of my device on its side designed for contact with switchboard equipment. Figure 2 shows a perspective view of my device showingthe side exposed to vision when in switch board use and carrying thereonany given visual notice of which the out of service is but one. Figure 3shows a section of a switch board with my safety device thereon.

Referring again to Figures 1 and 2. A shows the protecting portion of mydevice on the outer or exposed side of which appears the visual noticeof existing conditions. B, G, D, show the extension portions on'which Ais mounted and sufficiently distanced from the side E to insure a spacetherebetween in which the operating switch control may enter. The Ushaped opening in the side E is designed to slip over the switch controlon which the device .is used and to hang thereon in position untilconditions on the circuit are changed and require removal.

The device is satisfactorily moulded in one piece rubber, but theportions A, B, C, and D may be made from wood or other nonconductivesheet material. The side E is preferably of rubber or other pliable andnon-conductive sheet material, the pliability of which allows theremoval of the device, even in a careless and inexperienced manner,without injury to or accidental opera- @0121 of the switch control overwhich it is use I do not desire to confine myself to the specificdetails of construction herein set forth, but claim all such variationsand equivalents as may well be construed to fall within the scope of theappended claims.

Having thus described my invention I claim as new and desire to secureby Letters Patent of the United States of America 1. A device of thekind described, comprising a body portion shaped to fit over a switchcontrol, having a pliable side carrying therein an opening adaptable toengage and hang on said switch control.

2. A device of the kind described comprising a body portion shaped tofit over a switch control, having a pliable side carrying therein anopening adaptable to engage and hang on said switch control, said devicehaving on its exposed side visual means of transmitting the requirementsof the circuit on the switch control of which the device is designed foruse.

In testimony whereof I alfix my signature.

ALLEN J. RYNO.

